ZSL Cookie Information

ZSL websites and related apps use cookies, by continuing to use our websites or apps you will have been deemed to have agreed to our use of cookies subject to any overriding browser settings you may have. 

What is a cookie?

A cookie is a small text file that’s stored on your computer or mobile device when you visit a website. 

Cookies perform several functions, such as remembering who you are on a particular site (your welcome message), to keeping you logged in to your account screen on an ecommerce site (however, you should always log out if you are using a public computer). Advertising agencies also use cookies to find out if they have served you an advert from a particular brand on a site, or if you have seen a particular advert before. Website owners will use cookies to follow which pages that you’ve read so that they can see what parts of the site are popular or not. In short, cookies are a way of providing statistics on site visits as well as some limited functionality that makes your site visit easier. When used properly cookies are an asset to a site visitor and a site owner. Most internet browsers automatically accept cookies but you can delete existing cookies from your browser and, by editing your internet browser options, choose not to receive cookies in future.

Please note that if you opt to disable some or all cookies, we are unable to guarantee that our websites will operate. 

Opting out of cookies

There are a number of options available so that you do not have to store any cookies at all. You can either set your browser so that it will not accept and store any cookie, or if you have a little more time and knowledge you are able to allow only certain ‘trusted’ sites to store cookies on your computer. These sites may include us (of course!), or the site where you carry out your online banking, or possibly your favourite news service.

It’s worth bearing in mind that if you decide to delete all of your cookies, then you will likely have to re-enter all of your usernames and passwords on all of the sites that you visit, which you previously didn’t even have to think about. As we mentioned before, cookies can be a real asset to your web surfing experience.

The Information Commissioner’s Office provides some advice about cookies and their use, but it also provides a link to ‘About cookies’ ( www.aboutcookies.org ) which is run by the law firm Pinsent Masons. This website provides even more information about cookies if you feel that this page and the ICO is not enough information for you, but it also details how you might delete any cookies that you find, and it also shows you how to allow those trusted sites to store their cookies on your computer.

Useful websites

Third party cookies

ZSL utilises the technology of third parties on a regular basis to ensure that we are using up to date systems which are managed by the best companies to provide us with the services that we need. This in turn means that there will be a number of third party cookies from our trusted suppliers used on our websites.

Each company is responsible for the cookies that they place onto your device and have separate policy documents to highlight their use. 

Key third party suppliers and links to their privacy policies:


ZSL uses analytics software managed by third parties, these services use cookies in order to provide statistical reports about our site visitors. Current third party analytics software include:

Google Analytics

We use Google Analytics to help us understand how visitors are using and engaging with our website and apps. This allows us to make improvements to our web services and your online experience.

The Google Analytics tracking tool uses a number of cookies to collect information and report website usage statistics and does so without personally identifying individual visitors to Google or ZSL. If you wish to opt-out of Google Analytics tracking please visit and install the Google Analytics Opt-out Browser Add-on. More information on how ZSL uses Google Analytics and related services can be found in our privacy policy.


ZSL uses services provided by Hotjar Ltd. Hotjar provides services including Heatmaps, Visitor recordings, Funnels and Form Analysis, Feedback Polls, Surveys and Recruiters. The information generated by the tracking code and cookies about your use of the website will be transmitted to and stored by Hotjar on servers in Ireland. Through the Hotjar tracking code the information collected is device specific data.

The following information may be collected from your device and browser:

  • your device's IP address (collected and stored in an anonymised format);
  • device screen size;
  • device type (unique device identifiers) and browser information;
  • geographic location (country only);
  • the preferred language used to display the webpage. 
  • referring domain;
  • pages visited;
  • geographic location (country only);
  • the preferred language used to display the webpage;
  • date and time when website pages were accessed;
  • Mouse events;
  • Keypresses.

Hotjar will use this information for evaluating your use of the ZSL website, compiling reports on website activity for website operators and providing other services relating to website activity and internet usage. Hotjar uses a variety of services hosted by third parties, such as Google Analytics and Optimizely. For information on how Google Analytics and Optimizely collect and use your information, please refer to their privacy policies. By continuing to use this website, you consent to the processing of the above data by Hotjar and by the third parties used by Hotjar in accordance with their respective privacy policies. The cookies used by Hotjar have differing durations; some are 365 days, some persist for the session only.

To opt out please go to the following link: https://www.hotjar.com/opt-out


ZSL website cookie list

The aim of this cookie list is to provide you with an understanding as to what types of cookies ZSL uses on our digital platforms. The list below covers key cookies that ZSL or our technology partners use, please be aware that this list is not exhaustive.

APISID, Drupal.tableDrag.showWeight, DrupalModuleFilter, HSID, NID, SAPISID, SID, SSID, __atuvc, __atuvs, _ceg.s, _ceg.u, _ga, cookie-agreed-en, ctools-collapsible-state, has_js, jserr_en, .semasio.net, _conv_r, _conv_v, _ga, bt2, di2, dt, km_ai, loc, uid, um, uvc, vc, .facetz.net, ,mathtag.com, .abmr.net, .pixel.rubiconproject, _gac_UA-786598-1, test_cookie, PREF, YSC, VISITOR_INFO1_LIVE, IDE, _gid, _dc_gtm_UA-786598-1, fr, vc, xtc, ck, oo, pt, sess, uuid2, mus, _gat_UA-786598-1, bkdc, bku, TDID, TDCPM, SEUNCY, sess, uuid2, uuid, PREF, uuidc, B, zoo_type, TapAd_TS, TapAd_DID, wfivefivec, unity.cadreon.com, AWSELB

Some of these cookies are used to support our online ticketing and checkout process, these cookies are session based and are used to remember your details as you proceed through the payment process.

Flash cookies

Adobe uses a particular type of cookie called a ‘Local Shared Object’, which is typically collected if you watch a video for example that uses the Adobe Flash media player, i.e. an embedded YouTube video on a page that is being played via Flash. Please note that these types of cookie will not be found on iPads, which do not support Flash.

Have a look at Adobe's website if you want to control Flash cookies on your computer. If you’ve got a Firefox browser you can also get an add-on to detect and delete Flash cookies.

Web beacon

Web beacons are also sometimes referred to as ‘web bugs’ and are small single pixel transparent image files. They allow website owners to know when a visitor has reached their website, and are used in conjunction with cookies to allow further website tracking to be monitored. Again, these files are not viruses, but are useful in helping us to make your web surfing experience better.

Privacy Policy

ZSL is committed to protecting your privacy in accordance with their obligations under data protection legislation. The current data protection law is found in the Data Protection Act 1998 but with effect from 25th May 2018, the main data protection law will be the General Data Protection Regulation as supplemented by the Data Protection Act 2018 and related laws.

The ZSL privacy policy explains what information ZSL collects about you and how it will be used. You can read our full privacy policy here.